/**
 * Copyright 2020 Alibaba Group Holding Limited.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.alibaba.maxgraph.sdk.exception;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class ExceptionHolder {
    private static final Logger logger = LoggerFactory.getLogger(ExceptionHolder.class);
    private Throwable exception;

    public ExceptionHolder() {
        this.exception = null;
    }

    public Throwable getException() {
        return exception;
    }

    public void hold(Throwable e) {
        synchronized (this) {
            if (null == exception) {
                exception = e;
            } else {
                logger.error("exception", e);
            }
        }
    }
}
